OPERATING MANUAL OXYGEN MONITORING SYSTEM
OMS 420
21
9.3
Main measuring menu
After warm-up, the unit will start automatically by displaying the main measurement menu.
O
2
real time value with 0.01% resolution
CO
e
real time value with ppm resolution
Press “INFO” key for “info” menu
(see chapter 9.4)
Press “SERV” key for “service” menu
(see chapter 9.5)
Press “SET” key for “settings” menu
(see chapter 9.6)
Press “CALIB” key for “calibration” menu
(see chapter 9.7)
9.4
Info menu
In the “INFO” menu the following parameters can be called up from a scroll up/down list:
•
Next back-purge
in hours/minutes
•
Next automatic set to zero in days/hours
•
If the display shows „----„ the automatic set to zero is not activated
•
Gas humidity
display in % 1 - 25 or disabled
•
O
2
value
wet:
The
O
2
display is calculated to
“
wet“ (*)
dry:
The
O
2
display is calculated to
“
dry“(*).
The gas humidity can be set by “SET” to
“
Set gas humidity“
•
4 - 20 mA 0
2
setting range of analog O
2
output
•
4 - 20 mA CO
setting range of analog COe output
•
Firmware
installed firmware version
•
Hardware
installed hardware version
•
Serial number
display of the serial number
•
O
2
sensor
installed
•
CO sensor
installed/not installed
(*) Formula for O
2
calculation dry/wet
%
97
.
20
max
2
=
O
oxygen content in air
=
wet
O
2
measured O
2
-value in wet stack gas
=
dry
O
2
calculated (%) O
2
-value dry
=
H
water content (%) in stack gas, (value entered manually),
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
−
⋅
=
dry
O
wet
O
H
2
2
1
100
therefore calculation of
⎟
⎠
⎞
⎜
⎝
⎛
−
⋅
=
H
wet
O
dry
O
100
100
2
2
NOTE:
If between 30 min no button is
pressed during the measurement,
the level will be set on "0". I.e. the
menus SET and CALIB are only by
renewed PIN input usable.
www.
GlobalTestSupply
.com
Find Quality Products Online at:
